Hi Bert,
well actually there are two lighthouses at Dungeness, one decommissioned and open to the public, the other operational. The nuclear power station also has two reactors (A) and (B) From memory the large blob that's visible from sea is Dungeness B. I believe there was to have been a C reactor - possibly a fast breeder, but this was never implemented. Output of the stations is in the GigaWatt range, so they power it bit more than the lighthouse. It does seem a bit incongrous that a lighthouse two or three hundred yards from a power station has its own diesel generator for when the power fails! Anyone from that area with more up to date info?

My point was really that when the song was originally in common shipboard use, there was no naviational beacon on Dungeness and everyone would want to avoid it like the plague, especially as coming up Channel it would be a lee shore nine times out of ten; and that you would not, nor want to, "sight" it.

Pete M